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org.apache.poi.poifs.crypt.dsig</FONT>
<BR>
Class SignatureInfo</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.poi.poifs.crypt.dsig.SignatureInfo</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.SignatureConfigurable.html" title="interface in org.apache.poi.poifs.crypt.dsig">SignatureConfig.SignatureConfigurable</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>SignatureInfo</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.SignatureConfigurable.html" title="interface in org.apache.poi.poifs.crypt.dsig">SignatureConfig.SignatureConfigurable</A></DL>
</PRE>

<P>
<p>This class is the default entry point for XML signatures and can be used for
 validating an existing signed office document and signing a office document.</p>
 
 <p><b>Validating a signed office document</b></p>
 
 <pre>
 OPCPackage pkg = OPCPackage.open(..., PackageAccess.READ);
 SignatureConfig sic = new SignatureConfig();
 sic.setOpcPackage(pkg);
 SignatureInfo si = new SignatureInfo();
 si.setSignatureConfig(sic);
 boolean isValid = si.validate();
 ...
 </pre>
 
 <p><b>Signing an office document</b></p>
 
 <pre>
 // loading the keystore - pkcs12 is used here, but of course jks &amp; co are also valid
 // the keystore needs to contain a private key and it's certificate having a
 // 'digitalSignature' key usage
 char password[] = "test".toCharArray();
 File file = new File("test.pfx");
 KeyStore keystore = KeyStore.getInstance("PKCS12");
 FileInputStream fis = new FileInputStream(file);
 keystore.load(fis, password);
 fis.close();
 
 // extracting private key and certificate
 String alias = "xyz"; // alias of the keystore entry
 Key key = keystore.getKey(alias, password);
 X509Certificate x509 = (X509Certificate)keystore.getCertificate(alias);
 
 // filling the SignatureConfig entries (minimum fields, more options are available ...)
 SignatureConfig signatureConfig = new SignatureConfig();
 signatureConfig.setKey(keyPair.getPrivate());
 signatureConfig.setSigningCertificateChain(Collections.singletonList(x509));
 OPCPackage pkg = OPCPackage.open(..., PackageAccess.READ_WRITE);
 signatureConfig.setOpcPackage(pkg);
 
 // adding the signature document to the package
 SignatureInfo si = new SignatureInfo();
 si.setSignatureConfig(signatureConfig);
 si.confirmSignature();
 // optionally verify the generated signature
 boolean b = si.verifySignature();
 assert (b);
 // write the changes back to disc
 pkg.close();
 </pre>
 
 <p><b>Implementation notes:</b></p>
 
 <p>Although there's a XML signature implementation in the Oracle JDKs 6 and higher,
 compatibility with IBM JDKs is also in focus (... but maybe not thoroughly tested ...).
 Therefore we are using the Apache Santuario libs (xmlsec) instead of the built-in classes,
 as the compatibility seems to be provided there.</p>
 
 <p>To use SignatureInfo and its sibling classes, you'll need to have the following libs
 in the classpath:</p>
 <ul>
 <li>BouncyCastle bcpkix and bcprov (tested against 1.54)</li>
 <li>Apache Santuario "xmlsec" (tested against 2.0.5)</li>
 <li>and slf4j-api (tested against 1.7.12)</li>
 </ul>
<P>

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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.SignaturePart.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureInfo.SignaturePart</A></B></CODE>

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<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#SignatureInfo()">SignatureInfo</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructor initializes xml signature environment, if it hasn't been initialized before</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#confirmSignature()">confirmSignature</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;add the xml signature to the document</TD>
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<CODE>&nbsp;<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureConfig</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#getSignatureConfig()">getSignatureConfig</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>&nbsp;java.lang.Iterable&lt;<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.SignaturePart.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureInfo.SignaturePart</A>&gt;</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#getSignatureParts()">getSignatureParts</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>protected static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#initXmlProvider()">initXmlProvider</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Initialize the xml signing environment and the bouncycastle provider</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#postSign(org.w3c.dom.Document, byte[])">postSign</A></B>(org.w3c.dom.Document&nbsp;document,
         byte[]&nbsp;signatureValue)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Helper method for adding informations after the signing.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/DigestInfo.html" title="class in org.apache.poi.poifs.crypt.dsig">DigestInfo</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#preSign(org.w3c.dom.Document, java.util.List)">preSign</A></B>(org.w3c.dom.Document&nbsp;document,
        java.util.List&lt;<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/DigestInfo.html" title="class in org.apache.poi.poifs.crypt.dsig">DigestInfo</A>&gt;&nbsp;digestInfos)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Helper method for adding informations before the signing.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#setSignatureConfig(org.apache.poi.poifs.crypt.dsig.SignatureConfig)">setSignatureConfig</A></B>(<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureConfig</A>&nbsp;signatureConfig)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>&nbsp;byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#signDigest(byte[])">signDigest</A></B>(byte[]&nbsp;digest)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sign (encrypt) the digest with the private key.</TD>
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<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#verifySignature()">verifySignature</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#writeDocument(org.w3c.dom.Document)">writeDocument</A></B>(org.w3c.dom.Document&nbsp;document)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Write XML signature into the OPC package</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="SignatureInfo()"><!-- --></A><H3>
SignatureInfo</H3>
<PRE>
public <B>SignatureInfo</B>()</PRE>
<DL>
<DD>Constructor initializes xml signature environment, if it hasn't been initialized before
<P>
</DL>

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<A NAME="getSignatureConfig()"><!-- --></A><H3>
getSignatureConfig</H3>
<PRE>
public <A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureConfig</A> <B>getSignatureConfig</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the signature config</DL>
</DD>
</DL>
<HR>

<A NAME="setSignatureConfig(org.apache.poi.poifs.crypt.dsig.SignatureConfig)"><!-- --></A><H3>
setSignatureConfig</H3>
<PRE>
public void <B>setSignatureConfig</B>(<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureConfig</A>&nbsp;signatureConfig)</PRE>
<DL>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.SignatureConfigurable.html#setSignatureConfig(org.apache.poi.poifs.crypt.dsig.SignatureConfig)">setSignatureConfig</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureConfig.SignatureConfigurable.html" title="interface in org.apache.poi.poifs.crypt.dsig">SignatureConfig.SignatureConfigurable</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>signatureConfig</CODE> - the signature config, needs to be set before a SignatureInfo object is used</DL>
</DD>
</DL>
<HR>

<A NAME="verifySignature()"><!-- --></A><H3>
verifySignature</H3>
<PRE>
public boolean <B>verifySignature</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true, if first signature part is valid</DL>
</DD>
</DL>
<HR>

<A NAME="confirmSignature()"><!-- --></A><H3>
confirmSignature</H3>
<PRE>
public void <B>confirmSignature</B>()
                      throws javax.xml.crypto.dsig.XMLSignatureException,
                             javax.xml.crypto.MarshalException</PRE>
<DL>
<DD>add the xml signature to the document
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.xml.crypto.dsig.XMLSignatureException</CODE>
<DD><CODE>javax.xml.crypto.MarshalException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="signDigest(byte[])"><!-- --></A><H3>
signDigest</H3>
<PRE>
public byte[] <B>signDigest</B>(byte[]&nbsp;digest)</PRE>
<DL>
<DD>Sign (encrypt) the digest with the private key.
 Currently only rsa is supported.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>digest</CODE> - the hashed input
<DT><B>Returns:</B><DD>the encrypted hash</DL>
</DD>
</DL>
<HR>

<A NAME="getSignatureParts()"><!-- --></A><H3>
getSignatureParts</H3>
<PRE>
public java.lang.Iterable&lt;<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.SignaturePart.html" title="class in org.apache.poi.poifs.crypt.dsig">SignatureInfo.SignaturePart</A>&gt; <B>getSignatureParts</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a signature part for each signature document.
 the parts can be validated independently.</DL>
</DD>
</DL>
<HR>

<A NAME="initXmlProvider()"><!-- --></A><H3>
initXmlProvider</H3>
<PRE>
protected static void <B>initXmlProvider</B>()</PRE>
<DL>
<DD>Initialize the xml signing environment and the bouncycastle provider
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="preSign(org.w3c.dom.Document, java.util.List)"><!-- --></A><H3>
preSign</H3>
<PRE>
public <A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/DigestInfo.html" title="class in org.apache.poi.poifs.crypt.dsig">DigestInfo</A> <B>preSign</B>(org.w3c.dom.Document&nbsp;document,
                          java.util.List&lt;<A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/DigestInfo.html" title="class in org.apache.poi.poifs.crypt.dsig">DigestInfo</A>&gt;&nbsp;digestInfos)
                   throws javax.xml.crypto.dsig.XMLSignatureException,
                          javax.xml.crypto.MarshalException</PRE>
<DL>
<DD>Helper method for adding informations before the signing.
 Normally <A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#confirmSignature()"><CODE>confirmSignature()</CODE></A> is sufficient to be used.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.xml.crypto.dsig.XMLSignatureException</CODE>
<DD><CODE>javax.xml.crypto.MarshalException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="postSign(org.w3c.dom.Document, byte[])"><!-- --></A><H3>
postSign</H3>
<PRE>
public void <B>postSign</B>(org.w3c.dom.Document&nbsp;document,
                     byte[]&nbsp;signatureValue)
              throws javax.xml.crypto.MarshalException</PRE>
<DL>
<DD>Helper method for adding informations after the signing.
 Normally <A HREF="../../../../../../org/apache/poi/poifs/crypt/dsig/SignatureInfo.html#confirmSignature()"><CODE>confirmSignature()</CODE></A> is sufficient to be used.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.xml.crypto.MarshalException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="writeDocument(org.w3c.dom.Document)"><!-- --></A><H3>
writeDocument</H3>
<PRE>
protected void <B>writeDocument</B>(org.w3c.dom.Document&nbsp;document)
                      throws javax.xml.crypto.MarshalException</PRE>
<DL>
<DD>Write XML signature into the OPC package
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>document</CODE> - the xml signature document
<DT><B>Throws:</B>
<DD><CODE>javax.xml.crypto.MarshalException</CODE></DL>
</DD>
</DL>
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